Ice-making machine



Patented Mar. 11,1884.

FIEQ/ 1 Ill 1 (No Model.)

G. TAYLOR & S. PEARSON.

ICE MAKING MACHINE.- No.294.935.

N. PETERS. Pholomhogmphr. Wuhingtm. n. c

UNTTED STATES PATENT @TTTQE.

GEORGE TAYLOR, OF EVERETT, AND FRED S. PEARSON, OF MEDFORD,

- I MASSACHUSETTS.

ICE-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 294,935, dated March 11, 1884.

To all whom it may concern Be it known that we, GEORGE TAYLOR, of Everett, and FRED S. PEARSON, of Medford, both in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Ice-Making Apparatus, of which the following is a specification.

,Our invention relates to improvements in ice-machines in which the refrigerant is introduced into the space between the double walls of a tank or mold and in directcont'act with the walls. Heretofore in such machines the refrigerant has been introduced at one point only, and has been made to traverse the entire length of the machine, its path being sometimes lengthened by means of longitudinal partitions or ribs, forming a tortuous or winding passage. In traveling such long distances the refrigerant has its heat-extracting properties so much reduced before reaching the outlet end of the machine as to have but little effect on the contents of the last pans or molds.

The objects of our invention are to provide means for equally and evenly distributing the refrigerant over all the'walls, and to enable theapparatus to be enlarged or reduced in size, as desired. To attain these objects we form a chamber at the top of each of the spaces between the double walls, introduce the refrigerant into these chambers, and so arrange the bottoms of the chambers that the refrigerant can escape only in thin films or small streams against the walls next to the liquid to be cooled or frozen, and so arrange the tanks that two or more may be readily joined together to form an apparatus of any desired size, as hereinafter described, reference being had to the accompanying drawings, in which Figure 1 is a plan of a four-sided tank, and Fig. 2 a plan of a three-sided tank. Fig. 3 shows the two joined together. Fig. 4 is a cross-section on line as x of Fig. 1; and Fig. 5 shows, on an enlarged scale, the arrangement for spreading the vaporizable liquid; and'Fi 6 shows an improved valve used in connection with our apparatus.

The tanks A, for containing water or an uncongealable liquid, in which pans B, containing water to be frozen ,are immersed, are formed Application filed December 1-2, 1883. (No model.)

with double sides a a. The space between these sides forms a receptacle, into which a liquid-such as liquefied ammoniais introduced, and which, 011 being relieved of the pressure requisite to keep it in the liquid state, evaporates rapidly, produces the intense cold incident to such evaporation, and extracts the heat from the liquid in contact with the inner sides of the tank. The sides of the tank exposed to the air are covered with some non-conducting material, as usual in ice-machines of this character.

To bring all the gas in intimate contact with the substance to be cooled and to provide a larger extent of cooling-surface, we form between the walls a a of the tank, and near their top, a chamber, a". chamber is notched, as shown in Figs. 3 and 5, at proper intervals to form a series of out-- lets, a next to the inner sides of the walls a a; or a continuous narrowvopening may be used instead. Through these outlets the liquid passes and spreads over the inner sides of the walls in thin films, when itevaporates and correspondingly reduces the temperature of the walls. The chamber a is connected by The bottom a of this pipes a to the force side, and the space he tween the walls by a similar pipe to the suc tion side, of a pump, by means of which a condensation and circulation of the ammonia is effected.

The valves 0, (shown in Fig. 6,) by means of which communication between the pipesa" and the chambers to is regulated, contain certain novel features of construction and pacle ing, and will form the subject-1natter of a futureapplication for a patent.

XVe prefer to have the tanks A supplied with a suitable brine, in which pans B, 0011- taining the water, are inserted; but it is evident that the water may be put directly into the tanks and be frozen by contact,with the walls, as in what are known as plate machines.

To render our apparatus capable of being varied in size and capacity, as desired, for transportation or other purposes, we provide a number of tanks, such as shown in Fig. 2. These tanks have three double'walls. The ends of two of these walls are adapted to fit by means of which they can be connected to another tank by bolts or screws.

Ve claim as our invention 2. In an ice-making apparatus, a tank having four double walls, as described, in combination with one or more tanks having three double walls, and adapted to be joined one to 1 another, substantially as and for the purpose 1. In a double-walled tank for making ice, set forth.

means for equally and evenly distributing a refrigerant consisting of a chamber partitioned off from the top of each space between the walls, and having its bottom provided with outlets next to the walls, as set forth.

GEORGE TAYLOR. F. S. PEARSON. XVit-n esses:

W. A. COPELAND, J. R. SNOW. 

